Helo to decide tolerance
Helo to decide tolerance
(OP)
Hi all,
I need a little help to determine a tolerance.
I have to design a bracket to fit to a vehicle using two pins. The two holes on the vehicle are at 1000+/-5mm centres. The holes are each 50+/-1mm diameter.
If I make the holes in my bracket the same diameter, what tolerance should I use on the holes centres to ensure the bracket always fits? It is not possible to use slots or adjust the centre distance on site. If I use 1000+/-5mm then their could be a nominal 10mm error.
Thanks
I need a little help to determine a tolerance.
I have to design a bracket to fit to a vehicle using two pins. The two holes on the vehicle are at 1000+/-5mm centres. The holes are each 50+/-1mm diameter.
If I make the holes in my bracket the same diameter, what tolerance should I use on the holes centres to ensure the bracket always fits? It is not possible to use slots or adjust the centre distance on site. If I use 1000+/-5mm then their could be a nominal 10mm error.
Thanks





RE: Helo to decide tolerance
What size are your pins and what tolerance, not sure that with such a wide tolerance of +/- 5mm you can get what you want.
desertfox
RE: Helo to decide tolerance
Pin dimensions not yet determined but need to be a nice running fit. I also think that I cannot get a perfect solution but thought I would see if I can get some 'best practise' replies.
Thanks
RE: Helo to decide tolerance
Not sure how your going to get a nice running fit with +/- 1mm on hole diameters.
To get a useful answer we need all the information (if a useful answer is possible in your case.
With the tolerances your quoting the pins would have to be a large clearence fit at present.
desertfox
RE: Helo to decide tolerance
KENAT,
Have you reminded yourself of FAQ731-376: Eng-Tips.com Forum Policies recently, or taken a look at posting policies: http://eng-tips.com/market.cfm?
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?